C.Primer.Plus(第六版)第八章 编程练习

#include<iostream>
#include<string>
using namespace std;
int pro_8_1_number=0;
void show_str(const char* name,int i=0);
struct CandyBar
{
char* name;
float weight;
int calories;
};
struct stringy
{
char* str;
int ct;
};
void set_candybar(CandyBar &candybar,char* ps_char="Millennum Munch",double weight=2.85,int calories=350);
void show_candybar(const CandyBar &candybar);
void show_pro_8_3(string &jerr_str);
void show_8_4(const stringy str1,int x=0);
void show_8_4(const char str2[],int x=0);
char* set_8_4(stringy &str3 ,char test[]);
template <typename T>//8.5
T Max(T arr[])
{
int key_max=arr[0];
for(int i=1;i<5;i++)
{
if(arr[i]>key_max)
key_max=arr[i];
}
return key_max;
}
template <typename T>//8.6
T maxn(T array[],int num)
{
int key_max=array[0];
for(int i=0;i<num;i++)
{
if(array[i]>key_max)
key_max=array[i];
}
return key_max;
}
template<> char* maxn<char*>(char* arr[],int number)//具体化
{
int max=0;
for(int i=1;i<number;i++)
{
if(strlen(arr[i])>strlen(arr[0]))
max=i;
}
return arr[max];
}
struct debts
{
char name[10];
double amount;
};
template <typename T>
T ShowArray_8_7(T *arr,int n)
{
int sum=0;
for(int i=0;i<n;i++)
sum+=arr[i];
return sum;
}
template <typename T>
T ShowArray_8_7(T* *arr,int n)//在vc6.0中该定义存在二义性，函数参数可解释为(T*)*/(T)**,其中括号表示返回值类型，前者与上一个函数等价，后者调用含指针参数的函数，vc6.0不会进行最优选择而是报错提示。
{
double sum=0;
for(int i=0;i<n;i++)
sum+=(*arr[i]);
return sum;
}
int main()
{
/*
//8.1
const char arr[20]="jerry peng";
show_str(arr);
cout<<endl;
show_str(arr,1);
*/
/*
//8.2
CandyBar jerr_box;
set_candybar(jerr_box);
show_candybar(jerr_box);
set_candybar(jerr_box,"jerry_peng",22.2,2);
show_candybar(jerr_box);
*/
/* //8.3
string jerr_str;
show_pro_8_3(jerr_str);
*/
/*
//8.4
stringy beany;
char testing[]="Reality isnt what is used to be.";
char* ps=set_8_4(beany,testing);//在函数中使用动态分配数组，将指向的地址赋给另一个指针用于释放内存。
show_8_4(beany);
show_8_4(beany,2);
testing[0]='D';
testing[2]='U';
show_8_4(testing);
show_8_4(testing,2);
show_8_4("Dn=one!");
delete [] ps;
*/
/*
//8.5
int arr_8_5[5]={1,233,232,214,4};
double doulbe_8_5[5]={1231,32442,23532,21,35363};
cout<<Max(arr_8_5)<<endl;
cout<<Max(doulbe_8_5)<<endl;
*/
/*
//8.6
int arr_8_6[6]={23,43,234,53,54,5};
double darr_8_6[4]={239,345,22,325};
cout<<maxn(arr_8_6,6)<<endl;
cout<<maxn(darr_8_6,4)<<endl;
char* str_8_6[5]={"sdfsfs sdfs","sdfgdxf dfjsdkd","i miss you","what happened?","are you kidding me?"};
cout<<maxn<char*>(str_8_6,5)<<endl;
cout<<int(maxn<char*>(str_8_6,5))<<endl;
*/
/*
//8.7
int things[6]={1,2,34,5,6,77};
struct debts pro_str[3]=
{
{"xx",2400.0},
{"yy",1200.0},
{"zz",2999.0}
};
double *pd[3];
for(int i=0;i<3;i++)
pd[i]=&pro_str[i].amount;
cout<<ShowArray_8_7(things,6)<<endl;
//
ShowArray_8_7(pd,1);
二义性
*/
return 0;
}
/*
//8.1
void show_str(const char* name,int i)
{
pro_8_1_number++;
if(i==0)
cout<<name<<endl;
else
{
for(;pro_8_1_number>0;pro_8_1_number--)
cout<<name<<endl;
}
}
*/
/*
void set_candybar(CandyBar &candybar,char* ps_char,double weight,int calories)
{
candybar.calories=calories;
candybar.name=ps_char;
candybar.weight=weight;
}
void show_candybar(const CandyBar &candybar)
{
cout<<candybar.calories<<"t"<<candybar.name<<"t"<<candybar.weight<<endl;
}
*/
/*
void show_pro_8_3(string &jerr_str)
{
cout<<"Please enter a string (q to quit):";
while(getline(cin,jerr_str)&&jerr_str!="q")
{
cin.get();
for(int i=jerr_str.size();i>0;i--)
{
jerr_str[i-1]=toupper(jerr_str[i-1]);
}
cout<<jerr_str;
cout<<"nPlease enter next string (q to quit):";
}
cout<<"Bye!";
}
*/
/*
//8.4
void show_8_4(const stringy str1,int x)
{
for(int j=strlen(str1.str);x<j;x++)
cout<<str1.str[x];
cout<<endl;
}
void show_8_4(const char str2[],int x)
{
for(int k=strlen(str2);x<k;x++)
cout<<str2[x];
cout<<endl;
}
char* set_8_4(stringy &str3 ,char test[])
{
str3.str=new char[strlen(test)+1];
strcpy(str3.str,test);
return str3.str;
}
*/

最后

以上就是机灵故事为你收集整理的C.Primer.Plus(第六版)第八章 编程练习的全部内容，希望文章能够帮你解决C.Primer.Plus(第六版)第八章 编程练习所遇到的程序开发问题。

如果觉得靠谱客网站的内容还不错，欢迎将靠谱客网站推荐给程序员好友。